CN111722459A

CN111722459A - Laser device assembly, laser light source and laser projection equipment

Info

Publication number: CN111722459A
Application number: CN201910210132.XA
Authority: CN
Inventors: 周子楠
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-09-29
Anticipated expiration: 2039-03-19
Also published as: CN111722459B

Abstract

The invention discloses a laser component, a laser light source and laser projection equipment, and relates to the technical field of laser projection equipment. The method is used for solving the problems of how to reduce the maximum width of the cross section of the light beam output by the laser assembly, realizing the volume miniaturization design of the subsequent light path assembly of the laser assembly and improving the light-emitting uniformity of the laser assembly. The laser assembly comprises a support and a plurality of laser units fixed on the support, wherein the plurality of laser unit arrays are arranged in the same plane, the light emitting directions of the plurality of laser units are consistent, and each laser unit comprises a light emitting part, a light collimating lens and a light shrinking lens; the light collimating lens is positioned on the light emitting path of the light emitting part; the light-shrinking lens is positioned on one side of the light collimating lens close to the light-emitting part. The laser assembly of the present invention is used in a laser projection device.

Description

Laser device assembly, laser light source and laser projection equipment

Technical Field

The invention relates to the technical field of laser projection equipment, in particular to a laser component, a laser light source and laser projection equipment.

Background

A laser light source is one of important components in a laser projection apparatus such as a laser television, a laser projector, and the like, for supplying an illumination beam to the laser television and the laser projector. The laser light source comprises a laser component and a light path component, wherein the laser component emits laser beams, the laser component can be divided into a red laser component, a blue laser component, a green laser component and the like according to the light emitting color of the laser component, multiple (namely two or more) laser components can exist in the laser light source, the light path component is used for mixing the light emitted by the multiple laser components, and the maximum width, the cross section shape, the uniformity and the like of the cross section of the light beam emitted by each laser component are adjusted to output the illumination light beam meeting the requirements. The size and cross-sectional shape of the maximum width of the beam emitted by the laser assembly affects the dimensions of certain optical components in the optical path assembly, and thus the volume of the optical path assembly and the main housing for the laser light source that houses the optical path assembly.

As an example, fig. 1 illustrates a laser assembly commonly used in the prior art, as shown in fig. 1, the laser assembly includes a support 01, and a plurality of laser units 02 and a circuit board 03 fixed on the support 01, the plurality of laser units 02 are arranged in the same plane in an array manner, and light emitting directions of the plurality of laser units 02 are the same, as shown in fig. 2, each laser unit 02 is electrically connected to the circuit board 03, each laser unit 02 includes a light emitting part 021 and an aspheric lens 022, the aspheric lens 022 is located on a light emitting path of the light emitting part 021, and the aspheric lens 022 is used for collimating a light beam emitted by the light emitting part 021. As shown in fig. 3, a divergence angle α of a light beam emitted from a light emitting part 021 along a fast axis direction (i.e., a direction X in fig. 2) is generally large and much larger than a divergence angle β along a slow axis direction (i.e., a direction Y in fig. 2, the direction Y being perpendicular to the direction X), and particularly, a red light emitting part, a divergence angle α of a red light beam emitted from the light emitting part along the fast axis direction can be up to 68.2 ° or more, and a divergence angle β along the slow axis direction is only about 8 °, so that the width of the red light beam emitted from the light emitting part 021 along the fast axis direction is large when the red light beam enters an aspheric lens 022, the width along the slow axis direction is small, the width of the light beam collimated by an aspheric lens 022 along the fast axis direction is large, the maximum width of a cross section of a light beam output from a single laser unit is large, and the maximum width of a cross section of a light beam output from a laser module including a plurality of laser units is large, therefore, the size of some optical elements in the subsequent optical path component of the laser component needs to be designed to be larger to realize the transmission of the light beam with the larger maximum width of the cross section, which is not beneficial to the volume miniaturization design of the optical path component and the main shell for accommodating the optical path component, and the cross section of the light beam output by a single laser unit is in an oval shape with a large major axis and a small minor axis, thereby causing the light-emitting uniformity of the laser component comprising a plurality of laser units uniformly arranged in the same plane to be smaller.

Disclosure of Invention

The invention provides a laser assembly, a laser light source and laser projection equipment, which are used for solving the problems of how to reduce the maximum width of the cross section of a light beam output by the laser assembly, realizing the volume miniaturization design of a subsequent light path assembly of the laser assembly and improving the light-emitting uniformity of the laser assembly.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, some embodiments of the present invention provide a laser assembly, where the laser assembly includes a support and a plurality of laser units fixed on the support, the plurality of laser units are arranged in a same plane, and light emitting directions of the plurality of laser units are the same, and each laser unit includes a light emitting portion, a light collimating lens, and a light converging lens; the light collimating lens is positioned on the light emitting path of the light emitting part and is configured to collimate the light beam emitted by the light emitting part; the light-converging lens is positioned on one side of the light-collimating lens near the light-emitting portion, and is configured to change the divergence angle of the light beam emitted by the light-emitting portion in the fast axis direction of the laser unit before the light beam enters the light-collimating lens.

In some embodiments, the light emitting portion is a red emitting light emitting portion.

In some embodiments, both the reduction lens and the light collimating lens are lenses; the light incident surface of the light-shrinking lens is configured to reduce the divergence angle of the light beam emitted by the light-emitting part along the fast axis direction, and the light emergent surface of the light-collimating lens is configured to collimate the light beam emitted by the light-emitting part; the light emergent surface of the light shrinkage lens is attached to the light incident surface of the light collimating lens, and the material of the light shrinkage lens is the same as that of the light collimating lens.

Further optionally, along a direction parallel to a slow axis of the light beam emitted by the light emitting unit, intersecting lines of positions on the light incident surface of the light reduction lens and a plane perpendicular to the slow axis direction are all straight lines.

Further optionally, along a slow axis direction parallel to the light beam emitted by the light emitting unit, intersecting lines of positions on the light incident surface of the light reduction lens and a plane perpendicular to the slow axis direction are perpendicular to a central axis of the light beam emitted by the light emitting unit.

Optionally, the light-emitting surface of the light collimating lens is aspheric.

In some embodiments, the light incident surface of the condenser lens is further configured to increase a divergence angle of the light beam in the slow axis direction to increase a width of the light beam in the slow axis direction after being collimated by the light collimating lens.

In some embodiments, along a direction parallel to a fast axis of the light beam emitted by the light emitting portion, intersections of positions on the light incident surface of the light reduction lens and a plane perpendicular to the fast axis are concave curves.

Optionally, the curvature of the concave curve is 0-1.

Optionally, the distance between the light emitting surface of the light emitting part and the light incident surface of the light condensing lens is 0mm to 1mm along the central axis direction of the light beam emitted by the light emitting part. Illustratively, the distance between the light-emitting surface of the light-emitting part and the light-incident surface of the light-condensing lens along the central axis of the light beam emitted by the light-emitting part is 0.56 mm.

In some embodiments, the reduction lens is integrally formed with the light collimating lens.

In some embodiments, the refractive index of the material of the light-reducing lens is 1.5-1.9.

Compared with the prior art, in the laser assembly provided by the invention, the laser unit comprises the light emitting part and the light collimating lens positioned on the light emitting path of the light emitting part, and further comprises the light reducing lens, the light reducing lens is positioned on one side of the light collimating lens close to the light emitting part, and the light reducing lens is configured to change the divergence angle of the light beam emitted by the light emitting part in the fast axis direction before the light beam enters the light collimating lens, specifically, the light reducing lens can reduce the divergence angle of the light beam emitted by the light emitting part in the fast axis direction so as to reduce the width of the light beam emitted by the light emitting part in the fast axis direction after being collimated by the light collimating lens, so that a single laser unit can reduce the divergence angle of the light beam emitted by the light emitting part in the fast axis direction through the light reducing lens to achieve the purpose of reducing the width of the output light beam in the fast axis direction, thereby reducing the maximum width of the section of the output light, and further, the sizes of certain optical elements in the subsequent optical path of the laser assembly can be designed to be smaller, so that the volume miniaturization design of the subsequent optical path assembly of the laser assembly can be realized. Meanwhile, because the width of the output light beam of the laser unit along the fast axis direction is reduced, the cross section of the output light beam of the laser unit is closer to a circle, so that the cross section of the output light beam of the laser unit is more uniform, the improvement of the light-emitting uniformity of a laser assembly comprising a plurality of laser units arranged in the same plane is facilitated, and when the laser assembly is matched with light-equalizing components such as a diffusion sheet in a light path assembly for use, the light path can be better equalized.

In a second aspect, some embodiments of the present invention provide a laser light source, including a laser component, a main housing, and a light path component, where the laser component is the laser component according to any one of the above technical solutions, the main housing is located on a light emitting side of the laser component, the main housing is fixedly connected to the laser component, the light path component is disposed in the main housing, and the main housing is provided with a light inlet, where the light inlet is located on a light emitting path of a plurality of laser units of the laser component.

According to the laser light source provided by the invention, as the laser light source comprises the laser component in any technical scheme, the same technical problems can be solved and the same expected effects can be achieved.

In a third aspect, some embodiments of the present invention provide a laser projection apparatus, including a laser light source, an optical machine, and a projection lens, which are connected in sequence, where the laser light source is the laser light source according to the above technical solution, the optical machine is configured to modulate an illumination light beam emitted by the laser light source to generate an image light beam, and project the image light beam to the projection lens, and the projection lens is configured to image the image light beam.

According to the laser projection equipment provided by the invention, as the laser projection equipment comprises the laser light source in the technical scheme, the same technical problems can be solved and the same expected effect can be achieved by the laser projection equipment provided by the invention and the laser light source in the technical scheme.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a laser module according to the prior art;

FIG. 2 is a cross-sectional view of the laser assembly shown in FIG. 1;

FIG. 3 is a schematic diagram of the optical paths of the light emitting portion of the laser assembly shown in FIGS. 1 and 2 emitting light in the fast axis direction and the slow axis direction;

FIG. 4 is a perspective view of a first laser assembly provided by an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the laser assembly of FIG. 4;

fig. 6 is a schematic structural diagram of a laser unit in a laser module according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a laser unit of the laser assembly of FIG. 6 taken along section A-A;

FIG. 8 is a perspective view of a second laser assembly provided by an embodiment of the present invention;

FIG. 9 is a cross-sectional view of the laser assembly of FIG. 8;

FIG. 10 is a perspective view of a third laser assembly provided by embodiments of the present invention;

FIG. 11 is a cross-sectional view of the laser assembly of FIG. 10;

fig. 12 is a schematic structural diagram of a laser light source according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The laser assembly is included in the laser light source and is used for emitting laser beams.

In a first aspect, some embodiments of the present invention provide a laser assembly 110, as shown in fig. 4, the laser assembly 110 includes a support 111 and a plurality of laser units 112 fixed on the support 111, the plurality of laser units 112 are arranged in a same plane in an array, and light emitting directions of the plurality of laser units 112 are the same, as shown in fig. 5, each laser unit 112 includes a light emitting portion 1121, a light collimating lens 1122, and a light converging lens 1123; the light collimating lens 1122 is located on the light emitting path of the light emitting portion 1121, and the light collimating lens 1122 is configured to collimate the light beam emitted by the light emitting portion 1121; the reduction lens 1123 is located on a side of the light collimating lens 1122 close to the light emitting portion 1121, and the reduction lens 1123 is configured to change a divergence angle of the light beam emitted from the light emitting portion 1121 in the fast axis direction before the light beam enters the light collimating lens 1122, and specifically, the reduction lens 1123 reduces the divergence angle of the light beam emitted from the light emitting portion 1121 in the fast axis direction (direction X shown in fig. 7) to reduce a width of the light beam in the fast axis direction (direction X shown in fig. 7) after being collimated by the light collimating lens 1122.

Compared with the prior art, as shown in fig. 5, in the laser module 110 provided by the present invention, the laser unit 112 includes, in addition to the light-emitting portion 1121 and the light-collimating lens 1122 located on the light-emitting path of the light-emitting portion 1121, a light-reducing lens 1123, the light-reducing lens 1123 is located on one side of the light-collimating lens 1122 close to the light-emitting portion 1121, and the light-reducing lens 1123 is configured to change the divergence angle of the light beam emitted from the light-emitting portion 1121 in the fast axis direction before the light beam emitted from the light-emitting portion 1121 enters the light-collimating lens 1122, specifically, the light-reducing lens 1123 can reduce the divergence angle of the light beam emitted from the light-emitting portion 1121 in the fast axis direction (direction X shown in fig. 7) to reduce the width of the light beam emitted from the light-emitting portion 1121 in the fast axis direction (direction X shown in fig. 7) after being collimated by the light-collimating lens 1122, so that the single laser unit 112 can reduce the divergence angle of the light beam emitted from the light-emitting, the purpose of reducing the width of the output light beam along the fast axis direction (direction X shown in fig. 7) is achieved, so that the maximum width of the cross section of the outgoing light beam of the laser assembly 110 is reduced, and further the size of some optical elements in the subsequent optical path of the laser assembly 110 can be designed to be smaller, thereby realizing the volume miniaturization design of the subsequent optical path assembly of the laser assembly 110. Meanwhile, because the width of the output beam of the laser unit 112 along the fast axis direction is reduced, the cross section of the output beam of the laser unit 112 is more approximate to a circle, so that the cross section of the output beam of the laser unit 112 is more uniform, which is helpful for improving the light-emitting uniformity of the laser assembly 110 comprising a plurality of laser units 112 arranged in the same plane, and the light path can be better homogenized when the laser assembly 110 is matched with light-homogenizing components such as a diffusion sheet in the light path assembly.

As shown in fig. 4 and 5, the laser module 110 includes a circuit board 113 fixed to the support 111, in addition to the support 111 and the plurality of laser units 112 fixed to the support 111, and the plurality of laser units 112 are electrically connected to the circuit board 113.

The light emitting portion 1121 may be a light emitting chip, a light emitting device formed by packaging the light emitting chip and a reflecting prism, or an assembly of the light emitting chip and the reflecting prism, and is not particularly limited herein.

In some embodiments, as shown in fig. 4, the laser assembly 110 includes 8 laser units 112.

The light emitting portion 1121 may be a light emitting portion emitting red light, a light emitting portion emitting blue light, or a light emitting portion emitting green light, and is not particularly limited. In some embodiments, the light emitting portion 1121 is a red light emitting portion, and the divergence angle of the light beam emitted by the red light emitting portion along the fast axis direction (direction X shown in fig. 7) is large and can reach above 68.2 °, and a laser module using the red light emitting portion as a light source needs to adopt the laser module structure of the embodiment of the present invention more urgently to achieve the purpose of reducing the maximum width of the cross section of the output light beam.

In some embodiments, as shown in fig. 6 and 7, the light incident surface 11231 of the light converging lens 1123 is configured to reduce the divergence angle of the light beam emitted from the light emitting portion 1121 along the fast axis direction (direction X shown in fig. 7), and the light emitting surface 11222 of the light collimating lens 1122 is configured to collimate the light beam emitted from the light emitting portion 1121; the light emitting surface 11232 of the light converging lens 1123 is attached to the light incident surface 11221 of the light collimating lens 1122, and the material of the light converging lens 1123 is the same as that of the light collimating lens 1122. Thus, the purpose of reducing the divergence angle of the light beam emitted by the light emitting portion 1121 in the fast axis direction (direction X shown in fig. 7) can be achieved by only reasonably designing the light incident surface 11231 of the reduction lens 1123, and the purpose of collimating the light beam emitted by the light emitting portion 1121 can be achieved by reasonably designing the light emitting surface 11222 of the light collimating lens 1122, so that the reduction lens 1123 and the light collimating lens 1122 are less difficult to design and have lower design cost.

The light emitting surface 11232 of the light converging lens 1123 may be a plane or a curved surface, and correspondingly, the light incident surface 11221 of the light collimating lens 1122 may be a plane or a curved surface with a curvature corresponding to that of the light emitting surface 11232 of the light converging lens 1123, which is not limited herein. In some embodiments, as shown in fig. 6 and 7, the light emitting surface 11232 of the reduction lens 1123 and the light incident surface 11221 of the light collimating lens 1122 are both planes perpendicular to the central axis of the light beam emitted from the light emitting portion 1121, so that the reduction lens 1123 and the light collimating lens 1122 have simple structures, and are beneficial to reducing the difficulty in positioning between the reduction lens 1123 and the light emitting portion 1121 and between the light collimating lens 1122 and the light emitting portion 1121.

In order to make the light incident surface 11231 of the reduction lens 1123 reduce the divergence angle of the light beam emitted from the light emitting portion 1121 in the fast axis direction (direction X shown in fig. 7), the intersection line of each position on the light incident surface 11231 of the reduction lens 1123 and the plane perpendicular to the slow axis direction (direction Y shown in fig. 6) in the slow axis direction (direction Y shown in fig. 6) parallel to the light beam emitted from the light emitting portion 1121 may be a straight line or a convex curve, which is not particularly limited herein. In some embodiments, as shown in fig. 7, the intersection line of each position on the light incident surface 11231 of the reduction lens 1123 with the plane perpendicular to the slow axis direction (direction Y shown in fig. 6) along the direction parallel to the slow axis direction (direction Y shown in fig. 6) of the light beam emitted from the light emitting portion 1121 is a straight line, so that since the light rays diffused along the fast axis direction (direction X shown in fig. 7) among the light beams emitted from the light emitting portion 1121 do not enter perpendicularly when reaching the light incident surface 11231 of the reduction lens 1123, refraction occurs according to the formula n1 × sin α 1-n 2 × sin α 2 where n1 is the refractive index of the substance in the gap between the light emitting portion 1121 and the reduction lens 1123, α 1 is the incident angle of the light rays diffused along the fast axis direction (direction X shown in fig. 7) among the light beams emitted from the light emitting portion 1121 when entering the reduction lens 1123, n2 is the refractive index of the material of the reduction lens 1123, α 2 is a refraction angle of the light beam emitted from the light emitting portion 1121 and diffused in the fast axis direction (direction X shown in fig. 7) after entering the condenser lens 1123, and since the substance between the light emitting portion 1121 and the condenser lens 1123 is air, n1 is 1 and n2 is greater than 1, theoretically α 2 is smaller than α 1, and therefore, when intersection lines of respective positions on the light incident surface 11231 of the condenser lens 1123 and a plane perpendicular to the slow axis direction (direction Y shown in fig. 6) in the slow axis direction (direction Y shown in fig. 6) parallel to the light emitting portion 1121, the divergence angle of the light beam emitted from the light emitting portion 1121 in the fast axis direction (direction X shown in fig. 7) can be reduced. And when the intersection line of each position on the light incident surface 11231 of the condenser lens 1123 and the plane perpendicular to the slow axis direction (direction Y shown in fig. 6) is a straight line along the slow axis direction (direction Y shown in fig. 6) parallel to the light beam emitted by the light emitting portion 1121, the design difficulty of the light incident surface 11231 of the condenser lens 1123 is low, the structural complexity is small, and the manufacturing is easy.

According to the above-mentioned law of refraction formula, as shown in fig. 7, the larger n2, the smaller α 2, the larger the reduction degree of the diffusion angle of the light beam emitted from the light emitting part 1121 in the fast axis direction (direction X shown in fig. 7), and the smaller the width of the light beam emitted from the light emitting part 1121 in the fast axis direction (direction X shown in fig. 7) after being collimated by the light collimating lens 1122, the better the effect, but the larger n2, the higher the cost of the reduction lens 1123, and the larger the attenuation of the light beam emitted from the light emitting part 1121 after passing through the reduction lens 1123, therefore, in some embodiments, as shown in fig. 7, the refractive index n2 of the material of the reduction lens 1123 is 1.5 to 1.9, and at the same time, the optical effect of the reduction lens 1123, the cost of the reduction lens 1123, and the degree of the light beam emitted from the light emitting part 1121 can be considered at the same.

Further preferably, along a direction (direction Y shown in fig. 6) parallel to a slow axis of the light beam emitted from the light emitting portion 1121, an intersection line of each position on the light incident surface 11231 of the condenser lens 1123 and a plane perpendicular to the slow axis direction (direction Y shown in fig. 6) is perpendicular to a central axis of the light beam emitted from the light emitting portion 1121. Thus, the determination of the relative position between the light-incident surface 11231 of the condenser lens 1123 and the light-emitting portion 1121 is facilitated, reducing the difficulty of assembling the laser unit.

Further, optionally, as shown in fig. 6 and 7, the light-emitting surface 11222 of the light collimating lens 1122 is aspheric. Thus, the light collimating lens 1122 is an aspheric lens, which is a commonly used light collimating structure, and thus is easily realized.

Further, optionally, as shown in fig. 6 and 7, the light incident surface 11231 of the light reduction lens 1123 is further configured to increase the divergence angle of the light beam emitted by the light emitting portion 1121 in the slow axis direction (direction Y shown in fig. 6) so as to increase the width of the light beam in the slow axis direction (direction Y shown in fig. 6) after being collimated by the light collimating lens 1122. In this way, the cross section of the light beam output by the laser module is more approximate to a circle, so that the cross section shape of the output light beam of the laser unit 112 is more uniform, which is helpful for improving the light-emitting uniformity of the laser module 110 including a plurality of laser units 112 arranged in the same plane, and the laser module 110 can better homogenize the light path when being used with a light-homogenizing component such as a diffusion sheet in the light path module.

In the above embodiment, in order to make the light incident surface 11231 of the reduction lens 1123 capable of increasing the divergence angle of the light beam emitted from the light emitting portion 1121 in the slow axis direction (the direction Y shown in fig. 6), alternatively, as shown in fig. 6, the intersection lines of the positions on the light incident surface 11231 of the reduction lens 1123 and the plane perpendicular to the fast axis direction (the direction X shown in fig. 7) are concave curves in the direction parallel to the fast axis direction (the direction X shown in fig. 7) of the light beam emitted from the light emitting portion 1121.

The curvature of the concave curve may be constant (that is, the concave curve is a concave arc line) or may be continuously changed along the extending direction of the concave curve, which is not limited herein.

The curvature of the concave curve may be 0.5, 0.8, 1.2, etc., and is not particularly limited herein. In some embodiments, the curvature of the concave curve is 0-1. Therefore, the bending degree of each position on the concave curve is small, and the processing difficulty is low.

The distance d between the light incident surface 11231 of the light reduction lens 1123 and the light emitting surface of the light emitting portion 1121 may be 0.5mm, 0.8mm, 1.5mm, and the like, along the extension direction of the central axis of the light emitting portion 1121 emitting light beams, and is not particularly limited herein. In some embodiments, as shown in fig. 6, a distance d between the light incident surface 11231 of the light converging lens 1123 and the light emitting surface of the light emitting portion 1121 is 0mm to 1mm along an extending direction of a central axis of the light beam emitted by the light emitting portion 1121. Thus, the gap between the reduction lens 1123 and the light emitting portion 1121 is small, which is advantageous for the compact design of the laser module according to the embodiment of the present invention. Illustratively, along the extending direction of the central axis of the light beam emitted from the light emitting portion 1121, the distance d between the light incident surface 11231 of the light reducing lens 1123 and the light emitting surface of the light emitting portion 1121 is 0.56mm, so that the gap between the light reducing lens 1123 and the light emitting portion 1121 is moderate, which is beneficial to the compact design of the laser module according to the embodiment of the present invention, and meanwhile, the difficulty in designing the light incident surface 11231 of the light reducing lens 1123 due to the too small gap between the light reducing lens 1123 and the light emitting portion 1121 can be avoided.

In some embodiments, as shown in fig. 6 and 7, the reduction lens 1123 is integrally formed with the light collimating lens 1122. Therefore, the laser assembly provided by the embodiment of the invention has the advantages of fewer parts and lower assembly difficulty.

In the embodiment of the present invention, the structure of the holder 111 is not particularly limited as long as it can support a plurality of laser units 112 and ensure the relative positional relationship among the light emitting portion 1121, the light collimating lens 1122, and the condenser lens 1123 of each laser unit 112.

Specifically, the structure of the support 111 and the connection manner between the support 111 and the laser unit 112 can be implemented as the following three embodiments:

in the first embodiment, as shown in fig. 4 and 5, the bracket 111 is a block structure, a receiving groove 1111 is disposed on the bracket 111 corresponding to each laser unit 112, the light emitting part 1121 is fixed on the bottom wall of the receiving groove 1111, and the light collimating lens 1122 and the light converging lens 1123 are fixed on the side wall of the receiving groove 1111. The holder 111 has a simple structure, and can accommodate the laser unit 112 therein, thereby effectively protecting the laser unit 112.

In the above embodiment, the light converging lens 1123 may be directly fixed on the side wall of the receiving groove 1111, or may be fixed on the light collimating lens 1122, and fixed on the side wall of the receiving groove 1111 through the light collimating lens 1122, which is not limited herein. In some embodiments, as shown in fig. 5, the light-shrinking lens 1123 is fixed on the light-collimating lens 1122 and is fixed on the side wall of the receiving groove 1111 through the light-collimating lens 1122.

The light collimating lens 1122 may be fixed to the side wall of the receiving groove 1111 by bonding, clamping, or the like, and is not limited herein. In some embodiments, as shown in fig. 5, a step surface a is disposed on a side wall of the receiving groove 1111, the light incident surface of the light collimating lens 1122 is supported on the step surface a, a tin ring 1124 is sleeved in the receiving groove 1111, the tin ring 1124 is located on the light emitting side of the light collimating lens 1122, and the tin ring 1124 is heated to melt the tin ring 1124 and fix the tin ring 1124 with the bracket 111, so that the light collimating lens 1122 can be clamped between the step surface a and the tin ring 1124.

In the second embodiment, as shown in fig. 8 and 9, the support 111 includes a support plate 1111, a plurality of substrates 1112 and a plurality of cylindrical housings 1113, the plurality of substrates 1112 are fixed on the support plate 1111, the light emitting parts 1121 of the plurality of laser units 112 are fixed on the plurality of substrates 1112 in a one-to-one correspondence, the plurality of cylindrical housings 1113 are covered outside the plurality of light emitting parts 1121 in a one-to-one correspondence, an axial direction of each cylindrical housing 1113 is parallel to a light emitting direction of the light emitting part 1121 corresponding to the cylindrical housing 1113, and the light collimating lenses 1122 and the light converging lenses 1123 of the plurality of laser units 112 are fixed in the plurality of cylindrical housings 1113 in a one-to-one correspondence. The bracket 111 of the structure has less material and lighter weight.

In a third embodiment, as shown in fig. 10 and 11, the bracket 111 is a plate-shaped structure, the bracket 111 is provided with a groove 1111, the number of the laser units 112 is plural, the light emitting portions 1121 of the laser units 112 are disposed on the bottom wall of the groove 1111, the light converging lens 1123 of each laser unit 112 is fixed on the light collimating lens 1122, the light collimating lenses 1122 of the laser units 112 are integrally formed into an integrated structure, the integrated structure covers the opening of the groove 1111, and the integrated structure is fixed to the bracket 111. The laser assembly with the structure can reduce the space between two adjacent laser units so as to realize the volume miniaturization design of the laser assembly.

In a second aspect, some embodiments of the present invention provide a laser light source 100, as shown in fig. 12, the laser light source 100 includes a laser component 110, a main housing 120, and an optical path component 130, where the laser component 110 is the laser component 110 described in any one of the embodiments of the first aspect, the main housing 120 is located on a light emitting side of the laser component 110, the main housing 120 is fixedly connected to the laser component 110, the optical path component 130 is disposed in the main housing 120, the main housing 120 is provided with a light inlet 121, and the light inlet 121 is located on light emitting paths of a plurality of laser units of the laser component 110.

In the laser light source 100 provided by the present invention, since the laser light source 100 includes the laser component 110 according to any of the embodiments of the first aspect, the same technical problems can be solved and the same expected effects can be achieved by the laser light source 100 provided by the present invention and the laser component 110 according to any of the embodiments of the first aspect.

In a third aspect, some embodiments of the present invention provide a laser projection apparatus, as shown in fig. 13, including a laser light source 100, an optical machine 200, and a projection lens 300, which are connected in sequence, where the laser light source 100 is the laser light source 100 described in the foregoing embodiments, the optical machine 200 is configured to modulate an illumination light beam emitted by the laser light source 100 to generate an image light beam, and project the image light beam to the projection lens 300, and the projection lens 300 is configured to image the image light beam.

Since the laser projection device provided by the present invention includes the laser light source 100 described in the above embodiment, the same technical problems can be solved and the same expected effects can be achieved by the laser projection device provided by the present invention and the laser light source 100 described in the above embodiment.

In some embodiments, the laser projection apparatus further includes a projection screen disposed on the light exit path of the projection lens 300, and the projection light beam imaged by the projection lens 300 forms a projection picture on the projection screen.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A laser assembly is characterized by comprising a support and a plurality of laser units fixed on the support, wherein the laser units are arranged in the same plane in an array mode, the light emitting directions of the laser units are consistent, and each laser unit comprises a light emitting part, a light collimating lens and a light shrinking lens;

the light collimating lens is positioned on a light emitting path of the light emitting part and is configured to collimate the light beam emitted by the light emitting part;

the light-shrinking lens is positioned on one side of the light-collimating lens close to the light-emitting part, and the light-shrinking lens is configured to change the divergence angle of the laser unit in the fast axis direction before the light beam emitted by the light-emitting part enters the light-collimating lens.

2. The laser assembly of claim 1, wherein the light incident surface of the light converging lens is configured to reduce a divergence angle of the light beam emitted from the light emitting portion along a fast axis direction, and the light emitting surface of the light collimating lens is configured to collimate the light beam emitted from the light emitting portion;

the light emergent surface of the light-shrinking lens is attached to the light incident surface of the light collimating lens, and the light-shrinking lens is made of the same material as the light collimating lens.

3. The laser assembly of claim 2, wherein along a direction parallel to a slow axis of the light beam emitted by the light emitting section, each position on the light incident surface of the condensing lens intersects a plane perpendicular to the slow axis.

4. The laser assembly of claim 2 or 3, wherein the light exit surface of the light collimating lens is aspheric.

5. The laser assembly of claim 2 or 3, wherein the light incident surface of the light converging lens is further configured to increase a divergence angle of the light beam in a slow axis direction to increase a width of the light beam in the slow axis direction after being collimated by the light collimating lens.

6. The laser assembly of claim 5, wherein along a direction parallel to a fast axis of the light beam emitted by the light emitting section, each position on the light incident surface of the light converging lens intersects a plane perpendicular to the fast axis in a concave curve.

7. The laser assembly of claim 2, wherein the condensing lens is integrally formed with the light collimating lens.

8. The laser assembly of claim 3, wherein the refractive index of the material of the condensing lens is 1.5-1.9.

9. A laser light source is characterized by comprising a laser component, a main shell and a light path component, wherein the laser component is the laser component in any one of claims 1-8, the main shell is positioned on the light emitting side of the laser component, the main shell is fixedly connected with the laser component, the light path component is arranged in the main shell, a light inlet is formed in the main shell, and the light inlet is positioned on the light emitting paths of a plurality of laser units of the laser component.

10. A laser projection apparatus, comprising a laser light source, an optical machine, and a projection lens, which are connected in sequence, wherein the laser light source is the laser light source according to claim 9, the optical machine is configured to modulate an illumination beam emitted by the laser light source to generate an image beam, and project the image beam to the projection lens, and the projection lens is configured to image the image beam.